Jakob E. Lange: Studies in the Agarics of Denmark. III. 37 



with small umbo, at first almost smooth, later somewhat lihril- 

 lose and slightly rimose, pale ochraceous, umbo suhfulvous. 

 Veil evident, fibrillose. Stem without bulb, somewhat clubshaped 

 (base 1— 11 mm, apex 5— 7 mm), white, apex at last slightly 

 brownish, not pruinose but with white silky fibrils and slightly 

 llocculose above. Gills rather crowded, adfixed, at first whitish 

 then pallid cinnamon with a flush of yellowish. 



This species differs from /. fastiyiata by the fusoid cystidia, 

 from /. Cookei by want of bulb and by the muriculate cystidia. 

 — The I.descissa of Ricken (1. cit., p. 104) appears to be identic. 



20. I. auricoma (Batsch). 



Spores 9— 9 1 /* x ,"i |ii, obliquely ovate, pale brownish-yellow. Cy- 

 stidia on edge: a) ovate-clubshaped , b) obtusely bottleshaped, 

 about 12 u broad, slightly muriculate 



Fig specim.: Hjallese, copsewood (Corylus, Quercus etc.), Aug. 

 1915 (and in other similar localities). 



Cap lVg cm, conic, then expanded and umbonate, at first 

 smooth, then rimoso-fibrillose. The young cap is pallid ochra- 

 ceous, but soon the fibrils become deeper yellowish-ochraceous. 

 Stem subflocculoseand somewhat fibrillose (apex slightly pruinose) 

 not distinctly hollow. — The figure in Batsch: Elenchus Fun- 

 gorum (V 21) does not show the fibrillose-rimose nature of the 

 cuticle. 



21. I. pallidipes Ellis et Everh. Plate III, fig. 7 



Spores somewhat obliquely ellipsoid, 10—11 x 5— 5 x / 2 u - Cystidia 

 on edge: a) awlshaped-fusoid (free portion about 50 u. long), muri- 

 culate, b) short, cylindric-obovate. 



Fig. specim.: Aarup, on naked ground (roadside) in wood, Sept. 

 1901. — Also found in some other similar localities. 



Cap 2 — 3 cm, grayish-brown, at first minutely fibrillose-sub- 

 tlocculose (fibrils somewhat interwoven, whitish, silky), then some- 

 what rimose Veil well developed Stem cylindric, white, 3 1 / a 

 —4 cm. Gills narrowed behind, slightly adnate. Smell faint, 

 spermatic. 



This species is very intimately related to no. 10 and 11, and 

 possibly not specifically distinct. — I formerly referred it to /. 

 perbrevis (Weinm.); but as most modern authors use this name 

 for a fulvous or rufous little mushroom without muriculate cy- 

 stidia (vide Cooke loc cit. tab. 519, Massee, Monograph p. 490 etc.) 

 I have dropped this name. The description of /. pallidipes in 

 Massee's monograph (p 476) fits my plant very well. To judge 

 from the description /. entheloides Peck (another American species) 

 can hardly be specifically distinct 



22. I. descissa Fr. var. 



Spores obliquely ovate, 8V 2 — 10 X 5u. Cystidia fusoid-bottleshaped, 

 about 15 u broad, muriculate. 



